Matthew 7:6
Do not give dogs what is sacred and do not throw pearls before swine, in case they trample them under foot and turn to gore you.
Luke 8:33
and the daemons came out of the man and went into the swine; the drove rushed down the steep slope into the lake and were suffocated.
Luke 15:15
so he went and attached himself to a citizen of that land, who sent him to his fields to feed swine.
2 Peter 2:18-22
By talking arrogant futilities they beguile with the sensual lure of fleshly passion those who are just escaping from the company of misconduct ??19 promising them freedom, when they are themselves enslaved to corruption (for a man is the slave of whatever overpowers him).